A tetanus shot is typically given according to the following schedule: Infants and children receive a series of tetanus-containing vaccines at 2, 4, 6, and 18 months, and then again at 4 years of age. Adolescents should get a booster dose between ages 11 and 13. Adults are recommended to get a tetanus booster every 10 years, with additional boosters recommended at age 50 and 65 if it has been more than 10 years since the last dose. If someone gets a wound that is deep, dirty, or contaminated, and they have not had a tetanus shot within the last 5 years, they should get a tetanus shot as soon as possible, ideally within 48 to 72 hours after the injury. Travelers to countries with limited health services may also need a booster every 5 to 10 years depending on their risk. The primary childhood series combined with regular boosters effectively protects against tetanus, which is why boosters are important to maintain immunity throughout life.